<template>
  <!-- 搜索框区域 -->
  <view class="search-box">
    <my-search @click="gotoSearch"></my-search>
  </view>
  <!-- 轮播图区域 -->
  <view>
    <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000">
      <swiper-item v-for="(item, i) in swiperList" :key="i">
        <navigator class="swiper-item" :url="'/subpkg/goods_detail/goods_detail?good_id=' + item.goods_id">
          <image :src="item.image_src"></image>
        </navigator>
      </swiper-item>
    </swiper>
    
    <!-- 分类导航区域 -->
    <view class="nav-list">
       <view class="nav-item" v-for="(item, i) in navList" :key="i" @click="navClickHandler(item)">
         <image :src="item.image_src" class="nav-img"></image>
       </view>
    </view>
    
    <!-- 楼层区域 -->
    <view class="floor-list">
      <view class="floor-item" v-for="(item, i) in floorList" :key="i">
        <image :src="item.floor_title.image_src" class="floor-title"></image>
        <!-- 楼层图片区域 -->
        <view class="floor-img-box">
          <!-- 左侧大图片的盒子 -->
          <navigator class="left-img-box" :url="item.product_list[0].url">
            <image :src="item.product_list[0].image_src" :style="{width: item.product_list[0].image_width + 'rpx'}" mode="widthFix"></image>
          </navigator>
          <!-- 右侧 4 个小图片的盒子 -->
          <view class="right-img-box" >
            <navigator class="right-img-item" v-for="(item2, i2) in item.product_list" :key="i2" :url="item2.url">
              <template v-if="i2 !== 0" :url="item2.url">
                <image :src="item2.image_src" mode="widthFix" :style="{width: item2.image_width + 'rpx'}"></image>
              </template> 
            </navigator>
          </view>
        </view>
      </view>   
    </view>
  </view>
</template>

<script>
 export default {
   data() {
     return {
       // 1. 轮播图的数据列表，默认为空数组
       swiperList: [],
       navList: [],
       floorList: []
     };
   },
   onLoad() {
     // 2. 在小程序页面刚加载的时候，调用获取轮播图数据的方法
     this.getSwiperList()
     this.getNavList()
     this.getFloorList()
   },
   methods: {
     // 3. 获取轮播图数据的方法
     async getSwiperList() {
       // 3.1 发起请求
       const { data: res } = await uni.$http.get('/api/public/v1/home/swiperdata')
       // 3.2 请求失败
       if (res.meta.status !== 200)  return uni.$showMsg()
       // 3.3 请求成功，为 data 中的数据赋值
       this.swiperList = res.message
     },
     async getNavList() {
       const { data: res} = await uni.$http.get('/api/public/v1/home/catitems')
       if(res.meta.status !== 200) return uni.$showMsg()
       this.navList = res.message
     },
     // nav-item 项被点击时候的事件处理函数
     navClickHandler(item) {
       if(item.name === '分类') {
         uni.switchTab({
           url: '/pages/cate/cate'
         })
       }
     },
     // 获取楼层列表数据
     async getFloorList() {
       const { data: res } = await uni.$http.get('/api/public/v1/home/floordata')
       if (res.meta.status !== 200) return uni.$showMsg()
     
       // 通过双层 forEach 循环，处理 URL 地址
       res.message.forEach(floor => {
         floor.product_list.forEach(prod => {
           prod.url = '/subpkg/goods_list/goods_list?' + prod.navigator_url.split('?')[1]
         })
       })
     
       this.floorList = res.message
     },
     gotoSearch() {
       uni.navigateTo({
         url: '/subpkg/search/search'
       })
     }
   },
 }
</script>

<style lang="scss">
swiper{
  height: 330rpx;
  .swiper-item,
  image{
    width: 100%;
    height: 100%;
  }
}
.nav-list {
  display: flex;
  justify-content: space-around;
  margin: 15px 0;

  .nav-img {
    width: 128rpx;
    height: 140rpx;
  }
}

.floor-title {
  height: 60rpx;
  width: 100%;
  display: flex;
}

.right-img-box {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
}

.floor-img-box {
  display: flex;
  padding-left: 10rpx;
}
.search-box{
  position: sticky;
  top: 0;
  z-index: 999;
}
</style>
